node-sass安装报错解决

> node-sass@4.14.1 install G:\HBuilder work\bootstrapDemo\node_modules\node-sass
> node scripts/install.js

Downloading binary from https://github.com/sass/node-sass/releases/download/v4.14.1/win32-x64-72_binding.node
Cannot download "https://github.com/sass/node-sass/releases/download/v4.14.1/win32-x64-72_binding.node":

ESOCKETTIMEDOUT

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> node-sass@4.14.1 postinstall G:\HBuilder work\bootstrapDemo\node_modules\node-sass
> node scripts/build.js

Building: G:\Node\node.exe G:\HBuilder work\bootstrapDemo\node_modules\node-gyp\bin\node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=
gyp info it worked if it ends with ok
gyp verb cli [
gyp verb cli   'G:\\Node\\node.exe',
gyp verb cli   'G:\\HBuilder work\\bootstrapDemo\\node_modules\\node-gyp\\bin\\node-gyp.js',
gyp verb cli   'rebuild',
gyp verb cli   '--verbose',
gyp verb cli   '--libsass_ext=',
gyp verb cli   '--libsass_cflags=',
gyp verb cli   '--libsass_ldflags=',
gyp verb cli   '--libsass_library='
gyp verb cli ]
gyp info using node-gyp@3.8.0
gyp info using node@12.14.1 | win32 | x64
gyp verb command rebuild []
gyp verb command clean []
gyp verb clean removing "build" directory
gyp verb command configure []
gyp verb check python checking for Python executable "python2" in the PATH
gyp verb `which` failed Error: not found: python2
gyp verb `which` failed     at getNotFoundError (G:\HBuilder work\bootstrapDemo\node_modules\which\which.js:13:12) gyp verb `which` failed     at F (G:\HBuilder work\bootstrapDemo\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (G:\HBuilder work\bootstrapDemo\node_modules\which\which.js:80:29)
gyp verb `which` failed     at G:\HBuilder work\bootstrapDemo\node_modules\which\which.js:89:16
gyp verb `which` failed     at G:\HBuilder work\bootstrapDemo\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at G:\HBuilder work\bootstrapDemo\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:158:21)
gyp verb `which` failed  python2 Error: not found: python2
gyp verb `which` failed     at getNotFoundError (G:\HBuilder work\bootstrapDemo\node_modules\which\which.js:13:12) gyp verb `which` failed     at F (G:\HBuilder work\bootstrapDemo\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (G:\HBuilder work\bootstrapDemo\node_modules\which\which.js:80:29)
gyp verb `which` failed     at G:\HBuilder work\bootstrapDemo\node_modules\which\which.js:89:16
gyp verb `which` failed     at G:\HBuilder work\bootstrapDemo\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at G:\HBuilder work\bootstrapDemo\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:158:21) {
gyp verb `which` failed   stack: 'Error: not found: python2\n' +
gyp verb `which` failed     '    at getNotFoundError (G:\\HBuilder work\\bootstrapDemo\\node_modules\\which\\which.js:13:12)\n' +
gyp verb `which` failed     '    at F (G:\\HBuilder work\\bootstrapDemo\\node_modules\\which\\which.js:68:19)\n' + gyp verb `which` failed     '    at E (G:\\HBuilder work\\bootstrapDemo\\node_modules\\which\\which.js:80:29)\n' + gyp verb `which` failed     '    at G:\\HBuilder work\\bootstrapDemo\\node_modules\\which\\which.js:89:16\n' +
gyp verb `which` failed     '    at G:\\HBuilder work\\bootstrapDemo\\node_modules\\isexe\\index.js:42:5\n' +
gyp verb `which` failed     '    at G:\\HBuilder work\\bootstrapDemo\\node_modules\\isexe\\windows.js:36:5\n' +
gyp verb `which` failed     '    at FSReqCallback.oncomplete (fs.js:158:21)',
gyp verb `which` failed   code: 'ENOENT'
gyp verb `which` failed }
gyp verb check python checking for Python executable "python" in the PATH
gyp verb `which` succeeded python G:\python\python.EXE
gyp ERR! configure error
gyp ERR! stack Error: Command failed: G:\python\python.EXE -c import sys; print "%s.%s.%s" % sys.version_info[:3]; gyp ERR! stack   File "<string>", line 1
gyp ERR! stack     import sys; print "%s.%s.%s" % sys.version_info[:3];
gyp ERR! stack                                ^
gyp ERR! stack SyntaxError: invalid syntax
gyp ERR! stack
gyp ERR! stack     at ChildProcess.exithandler (child_process.js:295:12)
gyp ERR! stack     at ChildProcess.emit (events.js:223:5)
gyp ERR! stack     at maybeClose (internal/child_process.js:1021:16)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:283:5)
gyp ERR! System Windows_NT 10.0.17763
gyp ERR! command "G:\\Node\\node.exe" "G:\\HBuilder work\\bootstrapDemo\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd G:\HBuilder work\bootstrapDemo\node_modules\node-sass
gyp ERR! node -v v12.14.1
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
Build failed with error code: 1
npm WARN bootstrapdemo@1.0.0 No description
npm WARN bootstrapdemo@1.0.0 No repository field.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.14.1 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-sass@4.14.1 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Shine_QianMo\AppData\Roaming\npm-cache\_logs\2020-05-13T01_36_03_963Z-debug.log

解决办法：
1、先运行： npm install -g node-gyp
2、然后运行： npm install --global --production windows-build-tools**（管理员运行）**